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How do you factor # ax - ay - x² + 2xy - y²#?

1 Answer

May 1, 2016

#(x-y)(a-x+y)#

Explanation:

#ax-ay-x^2+2xy-y^2#
#=a(x-y)-(x^2-2xy+y^2)#
#=a(x-y)-(x-y)^2#
#=(x-y)(a-x+y)#

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